Leonard "Leo" Nowak (December 24, 1907 in Elizabeth, New Jersey – January 7, 2001 in Inyokern, California) was an American illustrator known for his work on Superman during the Golden Age of Comic Books, when he was one of Joe Shuster's assistants. In this role, he was the first (in both the comic strip and the comic book) to portray Lex Luthor as bald; in Luthor's earlier appearances, he had red hair. In 1942, Nowak co-created (with Jerry Siegel) the first character to be known as Robotman. In 1943, Nowak was drafted into the United States Army, and left comics.